Customize MultiDSLA Results

Nick Fox How-to, In More Depth

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeInteresting fact: a fully-equipped MultiDSLA system can output more than 180 measurements and indicators!   Now, you really don’t want all of them at the same time, in the same spreadsheet, in some arbitrary order, do you?  We thought not.  Check out this video ‘how-to’ to see how to get just what you want out of …

POLQA vs PESQ – “Why does PESQ give a lower score?”

Nick Fox How-to, In More Depth, Lab

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard Skype“Do I really need POLQA?” The question is understandable, as the cost of POLQA can be a little greater than the cost of PESQ. MultiDSLA customers recognize great value and sometimes want to pursue it to the limit!  Well, predictably, the answer is “It depends…” but to be more helpful Opale published …

Troubleshooting Voice Quality

Nick Fox How-to, In More Depth, Lab, Network Performance

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeWhen a quick dash for the MOS is not enough The Task Sometimes that quick dash to fill a spreadsheet with Mean Opinion Scores (MOS) just won’t cut it. OK, we get it, your manager wants a report on the voice quality performance of widget X, so you reach for the test …

Know everything about MOS – Part 3: Reference Speech Files

Aymeric TIBURCE How-to, In More Depth, Lab

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeSelecting Reference Speech Files In this third episode of “Do you really know everything about MOS” video series, we explain how to select correct reference speech files for POLQA and PESQ voice quality tests. You will also learn how to verify the ITU compliance of the reference speech files you are actually …

VoLTE Quality Assessment

Voice Quality Assessment for VoLTE Devices

Aymeric TIBURCE In More Depth, Lab

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeVoLTE device manufacturers’ challenge Modem chipset designers and cellular device manufacturers need to characterize the performance of their products. Not just under ‘ideal’ network conditions, but also in the ‘real world’ of packet loss and jitter. Network Operators too need to satisfy themselves about the voice quality delivered by new devices.  And …

POLQA & PESQ – Know everything about MOS – Part 2

Aymeric TIBURCE How-to, In More Depth, Lab

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypePOLQA or PESQ? In this second episode of “Do you really know everything about MOS?” video series, we explore in more details ITU PESQ and POLQA MOS algorithms and related test methodologies. You will learn what are the limitations for each algorithm, and when to choose PESQ or POLQA (ITU P.863) depending …

Know everything about MOS – Part 1
Wait… which MOS, exactly ?

Aymeric TIBURCE How-to, In More Depth, Lab

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeAbout this video: MOS has become a common requirement in device and network testing, but the origin and meaning of MOS can be obscured and confused. In this 4 min first video, we begin with a discussion of three key aspects of voice quality measurement : Mean Opinion Score, POLQA & PESQ …

Speech Transmission Bandwidths

Wideband or Narrowband?

Aymeric TIBURCE Company News, In More Depth

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypePhone services have seen an extension of the upper limit of audio frequency from the traditional 3.4kHz of PSTN to 7.5kHz for wideband. VoLTE and 4G services using AMR can be wideband. OTT or desktop applications can be 12kHz or up to super-wideband. Conferencing services may even be full-band.   How do …

windows10-home

Upgrading to Windows 10 Affects Softkeys

Aymeric TIBURCE In More Depth

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeMultiDSLA and other Malden applications can be installed and will run under Windows 10 Pro using softkey or dongle key management. If you are running MultiDSLA or SVN only on the Windows 7 Pro or Windows 8/8.1 Professional PC then upgrade MultiDSLA to v5.1.3 or SVN v 2.7.4 from the Software Maintenance Portal …